An atom that has an outer shell that is not full is (more likely or less likely) to be reactive than an atom that has a full outer shell.

A half filled orbital is LESS LIKELY to be reactive than a fully filled orbital

Explanation: A fully filled orbital has the electronic configuration of a noble gas. That is, unreactive.

The quantum states of these orbitals(fully filled) are stable because the electrons in the sub shell are fully filled which makes it difficult for it to loose and gain electron unlike a half filled which is much more easier. It will take more energy for ionization to take place making it(fully filled) more stable.

one centimetre is equal to 0.01 metres

the cladogram shown here shows similarities and differences among several classes of vertebrates. anatomically, the four have limb structure as their common ancestor. we might separate the mammals from the other three classes because they a) divergent; do not lay eggs b) identical; are warm-blooded c) varied; a four chambered heart d) homologous; have mammary glands